crc/whirlpool for archives

src/main/java/net/runelite/cache/fs/Archive.java

@@ -55,7 +55,7 @@ public class Archive
 		{
 			return false;
 		}
-		if (!Arrays.equals(this.whirlpool, other.whirlpool))
+		if (this.whirlpool != null && other.whirlpool != null && !Arrays.equals(this.whirlpool, other.whirlpool))
 		{
 			return false;
 		}

src/main/java/net/runelite/cache/fs/DataFile.java

@@ -180,8 +180,8 @@ public class DataFile implements Closeable
 		int sector;
 		int startSector;
 		
-		data = ByteBuffer.wrap(this.compress(data.array(), compression, revision));
-		int dataLen = data.remaining();
+		byte[] compressedData = this.compress(data.array(), compression, revision);
+		data = ByteBuffer.wrap(compressedData);
 		
 		//XTEA encrypt here?
 		
@@ -270,7 +270,9 @@ public class DataFile implements Closeable
 		
 		DataFileWriteResult res = new DataFileWriteResult();
 		res.sector = startSector;
-		res.compressedLength = dataLen;
+		res.compressedLength = compressedData.length;
+		res.crc = CRC32HGenerator.getHash(compressedData, compressedData.length - 2);
+		res.whirlpool = Whirlpool.getHash(compressedData, 0, compressedData.length - 2);
 		return res;
 	}
 	

src/main/java/net/runelite/cache/fs/DataFileWriteResult.java

@@ -3,4 +3,6 @@ package net.runelite.cache.fs;
 public class DataFileWriteResult
 {
 	public int sector, compressedLength;
+	public int crc; // crc of compressed data
+	public byte[] whirlpool;
 }

src/main/java/net/runelite/cache/fs/Index.java

@@ -351,6 +351,9 @@ public class Index implements Closeable
 			// XXX old data is just left there in the file?
 			DataFileWriteResult res = data.write(this.id, a.getArchiveId(), ByteBuffer.wrap(fileData), 0, this.revision);
 			this.index.write(new IndexEntry(this.index, a.getArchiveId(), res.sector, res.compressedLength));
+			
+			a.setCrc(res.crc);
+			a.setWhirlpool(res.whirlpool);
 		}
 	}